☣️ UN 3419 • CLASS 8
UN 3419 — Boron trifluoride acetic acid complex, solid
Placard: Corrosive. ERG Guide 157. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
🚒☣️
⚠️ Verification required:
Broad or variable material category; verify exact product, SDS and shipping papers.
⚠️ This page is a quick-reference aid. For real incidents: stage upwind, isolate, deny entry, request Hazmat early, and consult the current ERG + SOP/SOG.
UN 3419 is Boron trifluoride acetic acid complex, solid, a corrosive complex that can fume or decompose to release acidic and fluorinated vapors. Moisture contact can increase heat and corrosive gas generation.
Hazard overview: UN 3419 is toxic and corrosive to skin, eyes and respiratory tissues. Contact with water or moist air may release corrosive vapors such as hydrogen fluoride and acetic acid fumes, and fire can produce irritating or toxic gases.
Response guidance: For UN 3419, isolate the area, keep the material dry and avoid direct water application. Use dry chemical, CO2, dry sand or other compatible dry agents for small fires when safe. Prevent runoff and consult technical specialists for neutralization or cleanup.
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UN 3419 Quick Details
UN 3419
Product name: Boron trifluoride acetic acid complex, solid
DOT Class: 8
Placard type: Corrosive
ERG Guide: 157 (check current ERG)
Initial isolation: ERG 157: isolate 25-50m initial; large spill 800m downwind evacuation day, 1600m night
Common Hazards of UN 3419
- TOXIC and/or CORROSIVE; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance
- Reaction with water or moist air may release toxic, corrosive or flammable gases.
- Reaction with water may generate much heat that will increase the concentration of fumes in the air.
- Fire will produce irritating, corrosive and/or toxic gases.
- Runoff from fire control or dilution water may be corrosive and/or toxic and cause environmental
- Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive
- UN1802, UN2032, UN3084, UN3093, UN1796 (above 50%), UN1826 (above 50%), and UN2031 (above
- Vapors may accumulate in confined areas (basement, tanks, hopper/tank cars, etc.).
Chemical Identity & Physical Properties
UN 3419 is typically a white to off-white crystalline solid with a pungent acetic-acid-like odor. It may fume in moist air and can generate heat when contaminated with water.
| Also known as | Boron trifluoride acetate complexBF3 acetic acid complexTrifluoroborane acetic acid adduct |
| CAS Number | 373-61-5 |
| Appearance | White to off-white crystalline solid with a pungent, acetic acid-like odor at room temperature. |
| Flash Point | Not applicable (non-flammable solid) |
| Boiling Point | Decomposes before boiling, releases acetic acid and boron trifluoride |
| Vapor Density | Not applicable (solid, but vapors heavier than air upon decomposition) |
| Water Reactivity | Reacts with water releasing corrosive vapors (acetic acid, HF); generates heat |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3419
Extinguishing Media
Dry chemical, CO2, dry sand; avoid water-based agents
PPE Requirements
⚠️ Level B minimum; full-face SCBA required; chemical-resistant suit for liquid/solid contact
Use SCBA with chemical-resistant protective clothing resistant to acids and fluorides. Level A may be needed for significant releases, visible fuming or unknown vapor concentration.
Isolation & Evacuation
ERG 157: isolate 25-50m initial; large spill 800m downwind evacuation day, 1600m night
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 157).
First Actions for a UN 3419 Incident
- Keep unauthorized personnel away.
- Stay upwind, uphill and/or upstream.
- Ventilate closed spaces before entering, but only if properly trained and equipped.
- Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters
- For highlighted materials: see Table 1 - Initial Isolation and Protective Action Distances.
- For non-highlighted materials: increase the immediate precautionary measure distance, in the downwind
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📋 Copy & Share Field Card
UN 3419 — Boron trifluoride acetic acid complex, sHAZMAT RADIO NOTE — UN 3419
Product: Boron trifluoride acetic acid complex, solid
Class 8 / Corrosive / ERG 157
PPE: Level B minimum; full-face SCBA required; chemical-resistant suit for liquid/solid contact
ISOLATION: ERG 157: isolate 25-50m initial; large spill 800m downwind evacuation day, 1600m night
ACTION: Stage upwind · Isolate · Deny entry · Request HazmatRADIO
Use for: Quick radio or face-to-face size-up. Short, structured, field-ready.
=== IC HAZMAT BRIEFING ===
UN 3419 — Boron trifluoride acetic acid complex, solid
Class: 8 | Placard: Corrosive | ERG Guide: 157
Appearance: White to off-white crystalline solid with a pungent, acetic acid-like odor at room temperature.
Water Reactivity: Reacts with water releasing corrosive vapors (acetic acid, HF); generates heat
Extinguishing: Dry chemical, CO2, dry sand; avoid water-based agents
PPE: Level B minimum; full-face SCBA required; chemical-resistant suit for liquid/solid contact
Isolation: ERG 157: isolate 25-50m initial; large spill 800m downwind evacuation day, 1600m night
— Key Hazards —
• TOXIC and/or CORROSIVE; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance
• Reaction with water or moist air may release toxic, corrosive or flammable gases.
• Reaction with water may generate much heat that will increase the concentration of fumes in the air.
— First Actions —
• Keep unauthorized personnel away.
• Stay upwind, uphill and/or upstream.
• Ventilate closed spaces before entering, but only if properly trained and equipped.
• Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters
SOURCE: allfirefighter.com/hazmat/un/boron-trifluoride-acetic-acid-un-3419 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
UN3419 Boron trifluoride acetic acid complex, solid Cls8 ERG157 | allfirefighter.com/hazmat/un/boron-trifluoride-acetic-acid-un-3419SMS / 160 CHAR
Use for: Quick text to command or incoming units. Fits in a single SMS.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions.
Page: https://allfirefighter.com/hazmat/un/boron-trifluoride-acetic-acid-un-3419
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Frequently Asked Questions about UN 3419
UN 3419 is Boron trifluoride acetic acid complex, solid. It should be identified from shipping papers, markings and the SDS before responders work near the release.
ERG Guide 157 applies to UN 3419 for initial isolation, protective actions and first-response guidance.
UN 3419 is not primarily classified as flammable, but fire may produce toxic or corrosive gases and containers may become dangerous when heated.
Use SCBA with chemical-resistant protective clothing resistant to acids and fluorides. Level A may be needed for significant releases, visible fuming or unknown vapor concentration.
UN 3419 is toxic and corrosive to skin, eyes and respiratory tissues.
For UN 3419, isolate the area, keep the material dry and avoid direct water application.
Sources (high level): DOT/PHMSA marking & class concepts + ERG usage principles.
This page does not reproduce ERG guide text—always consult the current ERG for incident-specific protective actions.